I watched it in the 90's on Cartoon Network or Fox Kids or something like that. There was a space fleet (with a mothership of course), and there was a team of people, each of whom piloted one "mech" (big, anthropoid robot) while exploring and fighting on various planets. I have a vague memory of one mech being piloted by someone like Jubilee from the X-Men cartoon, and another by someone like Captain Nick Fury (the white one) from the animated Spider-Man - but that is probably my faulty memory.
In one episode a kind of super weapon was activated. It was an orange field that grew from the generator ship and annihilated (or maybe just stopped) every ship in sight.
That is all I can remember. (I don't think it was Japanese - but that is only a hunch)